Malicious PDF — malware analysis report

Static analysis result for SHA-256 80ca05fe888ec878…

MALICIOUS

PDF

34.3 KB Created: 2020-09-11 09:16:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f3e89e8b01cb5cd0d56393696c51434d SHA-1: 29773ee5df1789ea8f8d91fc7dcf356e69812524 SHA-256: 80ca05fe888ec878c3df1e4cf3d07e4bb7ce3f9a613620c13c46bcdd47bd2d6c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with the primary one leading to a known malicious redirector. This suggests a phishing or scam attempt, likely using a link farm to obscure the malicious destination. The document body, though heavily obfuscated, contains the malicious URL and references to other benign-looking PDFs, reinforcing the lure. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.club/wix?keyword=dermatix+sheet+clear In PDF document text
    • http://files.youthultimateprogram.org/uploads/1/3/1/1/131163533/181385.pdfIn PDF document text
    • http://futefo.myargosy.com/uploads/1/3/0/9/130969539/junepexo-nowepikekoj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0477/1999/files/suradi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1990/8758/files/absalom_and_achitophel_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5093/2123/files/21463450075.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3fd21f_ac2d661dd4e74f15bd1acdecc838e244.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/74e9cf_e2420e44e51e477490a7e49989a3b597.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/17beed_fbf9bebc2db64f2e9c4e53c8b9bb926a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/957eb4_b1880d69dbdf49c3bce308c0d5d89e82.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/fb83f1_a3ef1c10269e46d19a3fdf26df1f03b6.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9c8fb9_c85bc32783f14d8399773666f0ce4228.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/21a131_509fc37000e84b7d921760a968f8e132.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005da8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA8 4680 bytes
SHA-256: dbce362f2af6e9240cac237ca1745c7011888f6fd09ac3785f8d316942511a65
font_01_sfnt_off00006d87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D87 10012 bytes
SHA-256: 6f45bb357ea0316581350418151f02811385fcf8ad6ef1c0240ec2d438026861

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